Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...527..353b&link_type=abstract
The Astrophysical Journal, Volume 527, Issue 1, pp. 353-359.
Astronomy and Astrophysics
Astronomy
13
Stars: Binaries: Spectroscopic, Stars: Early-Type, Stars: Individual (Hd 1337, Hd 47129, Hd 57060), Stars: Winds, Outflows, Ultraviolet: Stars
Scientific paper
The ``Struve-Sahade effect'' (S-S effect) is the apparent weakness of lines of the secondary in massive binaries when the secondary is receding. This effect poses problems for the accurate reconstruction of the separated primary and secondary spectra. We have reexamined IUE spectra of three classical, hot binaries studied by D. Stickland in 1997. From various cross-correlation and tomographic techniques we find different results for each of the three systems. For HD 1337 (AO Cas), we find a slight S-S effect which can be explained by a mechanism of localized heating by the colliding stellar winds, as proposed by Gies, Bagnuolo, & Penny in 1997. For HD 47129 (Plaskett's star), no consistent S-S effect was found, and none is expected based on the wind heating model because the secondary has a slightly stronger wind. Finally, for HD 57060 (29 UW CMa), a strong S-S effect was found during the receding phases (0.13-0.63). In addition, we find a strong feature near phase 0.2, similar to the secondary in spectral type but shifted by ~-400 km s-1. We explain this by absorption and reemission by strong winds wrapping around the secondary. Thus, in general, we find that the S-S effect may arise from several distinct mechanisms.
Bagnuolo William G. Jr.
Gies Douglas R.
Penny Laura R.
Riddle Reed
No associations
LandOfFree
The Struve-Sahade Effect: A Tale of Three Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Struve-Sahade Effect: A Tale of Three Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Struve-Sahade Effect: A Tale of Three Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1750156